Modern valve aid with separate batteries

Made:
1951
Modern valve aid with separate batteries, Fortiphone

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Modern valve aid with separate batteries, Fortiphone
Science Museum Group
© The Board of Trustees of the Science Museum

Modern valve aid with separate batteries, Fortiphone, and chassis.

Details

Category:
Sound Reproduction
Object Number:
1951-677
type:
valve
credit:
Hearing Aid Manufacturers Association